1. Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Pusan National University and Medical Research Institute, Pusan National University Hospital, Busan, Korea
2. Pusan National University Medical Research Institute, Pusan National University School of Medicine, Busan, Korea
3. Department of Life Science in Dentistry, School of Dentistry, Pusan National University, Yangsan, Korea
4. Department of Otorhinolaryngology-Head and Neck Surgery, College of Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
5. Department of Otolaryngology-Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea